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Single-Crystalline Diluted Magnetic Semiconductor GaN:Mn Nanowires
Choi, H.-J.,Seong, H.-K.,Chang, J.,Lee, K.-I.,Park, Y.-J.,Kim, J.-J.,Lee, S.-K.,He, R.,Kuykendall, T.,Yang, P. WILEY-VCH Verlag 2005 Advanced Materials Vol.17 No.11
<B>Graphic Abstract</B> <P>Single-crystalline diluted magnetic semiconductor GaN:Mn nanowires with controlled Mn concentrations have been successfully synthesized and incorporated into devices (see Figure). These nanowires exhibit Curie temperatures above room temperature, magnetoresistances near room temperature, and spin-dependent transport. The nanowires are used as building blocks for the fabrication of GaN:Mn/n-SiC based light-emitting diodes. <img src='wiley_img/09359648-2005-17-11-ADMA200401706-content.gif' alt='wiley_img/09359648-2005-17-11-ADMA200401706-content'> </P>
Balance Control and Knee Osteoarthritis Severity
김희상,Seong He Choi,윤동환,유승돈,김동환,Yong Seol Jeong,Jee-Sang Yun,Dae Gyu Hwang,Pil Kyo Jung 대한재활의학회 2011 Annals of Rehabilitation Medicine Vol.35 No.5
Objective To investigate balance control according to the severity of knee osteoarthritis (OA) using clinical tests and Tetra-ataxiometric posturography (Tetrax®). Method A total 80 patients with primary knee OA classified according to American College of Rheumatology criteria, and 40 age-matched controls were enrolled in this study. Of those with OA, 39 patients had mild OA (Kellgren-Lawrence [KL] grade 1, 2) and the other 41 had moderate to severe OA (KL grade 3, 4). The postural control capabilities of the subjects were assessed using the timed up and go test (TUG), Berg balance scale (BBS),and Tetrax®, which utilizes two paired force plates to measure vertical pressure fluctuations over both heels and forefeet. The subjects were checked for their stability index (ST), Fourier index, weight distribution index (WDI),and synchronization index (SI) in eight positions using Tetrax®. Results Patients with moderate to severe OA exhibited signifi cantly higher stability indices in all positions than patients with mild OA. The Fourier index was also higher in patients with moderate to severe OA than in patients with mild OA. However, the weight distribution index and synchronization of both heels and forefeet were not signifi cantly diff erent in the three groups. Conclusion These fi ndings suggest that patients with moderate to severe OA have more defi cits in balance control than those with mild disease. Therefore, evaluation of balance control and education aimed at preventing falls would be useful to patients with knee OA.
자기제어(Magnetically Controlled) 성장형 금속봉을 이용한 조기 발현형 측만증 치료 결과
최승진(Seungjin Choi),김학선(Hak-Sun Kim),석경수(Kyung-Soo Suk),이환모(Hwan-Mo Lee),문성환(Seong-Hwan Moon),양재호(Jae-Ho Yang),이용준(Yongjun Lee),하중원(Joong-Won Ha),전혁(Quen He) 대한정형외과학회 2018 대한정형외과학회지 Vol.53 No.5
목적: 조기 발현형 측만증에 대한 치료법으로 최근 개발된 자기제어 성장형 금속봉을 이용하여 시행한 수술 치료 결과를 국내에서 최초로 보고하고자 한다. 대상 및 방법: 2013년 1월부터 2017년 1월까지 조기 발현형 측만증에 대하여 자기제어 성장형 금속봉을 이용하여 수술적 치료를 받은 환자 중 1년 이상 추시가 가능하였던 5명의 환자에 대해서 후향적 분석을 하였다. 환자의 최초 수술 시의 나이, 척추 기형의 종류, 최초 수술 후 금속봉의 연장 횟수, 주만곡의 Cobb 각 변화, 흉추 1번–천추 1번의 길이 변화, 흉추 1번–흉추 12번의 길이 변화, 흉추 후만각 변화, 요추 전만각 변화, 추시기간, 합병증에 대해 평가하였다. 결과: 남자가 3명, 여자가 2명이었으며, 최초 수술 시 평균 연령은 6.0±2.7세였고, 신경근육성 측만증이 2예, 증후군성 측만증이 1예, 특발성 측만증이 1예, 선천성 측만증이 1예였다. 평균 금속봉 연장 횟수는 9.8±2.9회였고, 평균 추시 기간은 평균 21.6±5.7개월이었다. 주만곡의 Cobb 각의 평균은 최초 수술 전 82.0°±28.5°에서 최종 추시 시 48.3°±28.8°로 호전되었고, 흉추 1번부터 천추 1번까지의 길이는 최초 수술 전 283.1±72.7 mm에서 최종 추시 시 342.6±86.3 mm로 평균 21.8%±14.9%의 척추 성장이 관찰되었다. 흉추 1번부터 흉추 12번까지의 길이는 최초 수술 전 163.1±50.5 mm에서 최종 추시 시 202.3±65.5 mm로 평균 12.0%±16.1%의 척추 성장이 관찰되었다. 수술 후 합병증으로는 갈고리 고정 실패가 1예가 있었으며, 신경학적 합병증은 없었다. 결론: 자기제어 성장형 금속봉은 조기 발현형 측만증에서 사용할 수 있는 효과적이고 유용한 치료법으로 판단된다. Purpose: To evaluate the first results of surgical treatment using newly developed magnetically controlled growing rods (MCGR) for early onset scoliosis (EOS). Materials and Methods: From January 2013 to January 2017, 5 patients, who underwent surgical treatment with MCGR for EOS and were followed for more than one year, were analyzed retrospectively. The demographic and radiology data, including age at surgery, diagnosis, number of lengthening, Cobb angle, T1–S1 length, T1–T12 length, and complications, were analyzed. Results: The mean age of the patients was 6.0±2.7 years old. The subjects were 3 males and 2 females: 2 with neuromuscular scoliosis, 1 with syndromic scoliosis, 1 with idiopathic scoliosis, and 1 with congenital scoliosis. The mean number of lengthening was 9.8±2.9 times and the follow-up was 21.6±5.7 months. The Cobb angle improved from 82.0°±28.5° to 48.3°±28.8° at the last follow-up. The T1–S1 length increased from 283.1±72.7 mm to 342.6±86.3 mm at the last follow-up. The T1–T12 length increased from 163.1±50.5 mm to 202.3±65.5 mm at the last follow-up. One screw loosening complication was encountered and there were no neurological complications. Conclusion: The treatment using MCGR for EOS is effective and useful.
콩과 피복작물 리빙멀치에 따른 옥수수 무경운 재배지의 잡초군락 변화
최봉수(Bong Su Choi),김충국(Chung Guk Kim),성기영(Ki Yeong Seong),송득영(Duk Young Song),전원태(Weon Tai Jeon),조현숙(Hyun Suk Cho),정광호(Kwang He Jeong),강위금(Ui Gum Kang) 韓國雜草學會 2011 Weed&Turfgrass Science Vol.31 No.1
이른 봄 녹비피복작물 생육에 따른 잡초의 발생은 헤어리베치구에서 크림손클로버구의 76%수준이었으며, 발생한 잡초총은 헤어리베치구에서 4종(냉이, 쇠별꽃, 점나도나물 및 꽃다지), 크림손클로버구에서 3종(냉이, 쇠별꽃 및 꽃다지)이었다. 두 피복작물 재배지에서 발생한 잡초 중 냉이는 다른 초종보다 현저히 많았고, 이에 따른 건물생산량도 가장 높았다. 크림손클로버구는 냉이 외에도 쇠별꽃의 개체수가 많았으며, 건물생산량도 쇠별꽃이 가장 높았다. 옥수수 생육중기의 경작지 발생 잡초는 관행구에서 9종으로 다양하였으며, 잡초의 개체수도 가장 많았다. 한편 헤어리베치구와 크림손클로버구의 발생 잡초는 각각 4종과 6종이었으며, 건물생산량은 각각 관행구의 18과 25% 수준으로 낮았다. 옥수수 수확 후 각 재배지 발생 잡초는 초종이 현저히 감소하여 바랭이를 비롯한 5종, 헤어리베치와 크림손클로버구에서 각각 5종과 4종이었다. 잡초의 건물율은 관행구에서 23.5%였으며, 헤어리베치와 크림손클로버는 각각 13.8과 14.7%로 관행구에 비해 현저히 낮았다. 한편 피복작물 재배구는 토양 피복에 의한 낮은 지온과 광차단 등으로 인하여 관행구에서 발생하지 않았던 쇠별꽃이 지속적으로 생육하였다. Cover crop can be used to suppress weeds by competition for light and nutrient. Objective of this study was to evaluate the effectiveness of legume cover crops on change of weed community in no-till corn cultivation. Two legume cover crops, hairy vetch and crimson clover were grown in the field, and succeeding corn was sown on 4 May, 2010. The distribution of weed was surveyed at 15 April, 1 June, and 20 August. At 15 April, the weed biomass in hairy vetch field was higher than in crimson clover field. The dominant weeds were Capsella bursa-pastoris L. and Stellaria aquatica L. in hairy vetch and crimson clover fields, respectively. At vegetative stage of corn, occurred weeds in hairy vetch and crimson clover fields were four and six species, respectively, while the weed was occurred with nine species in conventional. Also the dry weight of weed was decreased by 82 and 75% in hairy vetch and crimson clover fields compared to conventional. On the other hand, after harvest of corn, occurred weed in hairy vetch, crimson clover and conventional was five, four and five species, respectively. Dry weight percentage of occurred weed in conventional was 23.5%, and the value was higher than 13.8 and 14.7% in hairy vetch and crimson clover fields, respectively. Stellaria aquatica L. as winter annual weed only occurred in cover crop field during corn growing season. It is these possibilities that low soil temperature and light interception by soil cover of legume cover crop.
Genetic structure and variability of the working dog inferred from microsatellite marker analysis
Kwon, Yun-Jeong,Choi, Bong-Hwan,Eo, Jungwoo,Kim, Choongrak,Jung, Yi-Deun,Lee, Ja-Rang,Choi, Yuri,Gim, Jeong-An,Lee, Dong-Hoon,Ha, Ji-Hong,Kim, Dae-Soo,Huh, Jae-Won,Kim, Tae-Hun,Seong, Hwan-Hoo,Kim, He Springer-Verlag 2014 Genes & Genomics Vol.36 No.2
Working dogs serve as military watch dogs, search dogs, rescue dogs, and guide dogs with un-come-at-able character. They are drafted by in-training examination including concentration, capacity for locomotion, boldness and earthly desires. In this study, genetic diversity and relationships among two groups of working dogs (pass and fail group in-training examination) were assessed based on 15 microsatellite markers in 25 individuals of working dogs (military watch dogs and Korean search dogs). For the 15 microsatellite markers, the values of allelic richness (A (R) ) ranged from 2.21 (pass group) to 1.60 (fail group) in military watch dogs, while A (R) ranged from 2.79 (pass group) to 2.72 (fail group) in Korean search dogs. Among 52 different alleles of military watch dogs, 22 alleles were detected in pass group only, while 8 alleles in fail group only. In case of Korean search dogs, 3 alleles were observed in pass group only, while 13 alleles in fail group only. These group-specific unique alleles reflect good biomarker for selecting working dogs (military watch dogs and Korean search dogs), indicating that those group specific microsatellite alleles could separate working dogs to be pass or fail group in out-training dog population. Taken together, this study demonstrates the feasibility of microsatellite analyses for the selection of superior working dogs objectively. Furthermore, this approach could be used for the proper selection of working dogs in combination with in-training examination.
만성 염증성 탈수초성 다발신경병증과 헤노흐-쇤라인 자반증을 동반한 강직성 척추염
최병용 ( Byoong Yong Choi ),권현미 ( Hyun Mi Kwon ),성정준 ( Jung Jun Sung ),박성혜 ( Seong He Park ),송영욱 ( Yeong Wook Song ) 대한내과학회 2012 대한내과학회지 Vol.83 No.4
Peripheral nervous system dysfunction is a rare complication in Henoch-Schonlein purpura, but it tends to recover spontaneously without treatment. A 78-year-old man who had ankylosing spondylitis presented with Henoch-Schonlein purpura associated with progressive sensorimotor polyneuropathy. He was diagnosed with chronic inflammatory demyelinating polyneuropathy, which did not improve despite intravenous immunoglobulin therapy. We describe a case of Henoch-Schonlein purpura, accompanied by chronic inflammatory demyelinating polyneuropathy in a patient with ankylosing spondylitis. (Korean J Med 2012;83:538-542)
유지원 ( Ji Won Ryu ),남승우 ( Seong Woo Nam ),권혁춘 ( Hyuck Choon Kweon ),최승준 ( Song Jun Choi ),김상용 ( Sang Young Kim ),박현미 ( Heun Mi Park ),안혜선 ( He Sun An ) 전북대학교 의과학연구소 2010 全北醫大論文集 Vol.34 No.2
저자들은 만성 설사와 하지 부종을 주소로 내원한 63세 여자 환자에서 류마티스 관절염과 연관되고 대장에 국한된 속발성 유전분증을 진단하였고 환자의 임상경과를 기존의 문헌 고찰과 함께 보고하는 바이다. Suspicion of gastrointestinal amyloidosis in patients without known history of amyloidosis is difficult, but gastrointestinal amyloidosis should be considered in those older than 30year with unexplained diarrhea, weight loss or malabsorption. We experienced a case of an 63-year-old female in patient with rheumatoid arthritis, who have a chronic watery diarrhea caused by colonic amyloidosis. Congo-red stain and immunohistochemical stain for amyloid A protein of colonoscopic pathologic specimen showed positive response. Other organs such as kidney, heart, liver and skin, were not involved by amyloidosis. She was diagnosed to secondary and localized colonic amyloidosis related with rheumatoid arthritis. In spite of anti-rheumatic therapy, our patient did not recover.